Silver electrodeposition on nanostructured gold: from nanodots to nanoripples

• Autores: Dos Santos Claro, Paula Cecilia; Fonticelli, Mariano Hernán; Benitez, Guillermo Alfredo; Azzaroni, Omar; Schilardi, Patricia Laura; Luque, N. B.; Leiva, E.; Salvarezza, Roberto Carlos
• Año de publicación: 2006
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: Química; Nanopartículas; Plata; Oro
• Institución: Universidad Nacional de La Plata

Silver nanodots and nanoripples have been grown on nanocavity-patterned polycrystalline Au templates by controlled electrodeposition. The initial step is the growth of a first continuous Ag monolayer followed by preferential deposition at nanocavities. The Ag-coated nanocavities act as preferred sites for instantaneous nucleation and growth of the three-dimensional metallic centres. By controlling the amount of deposited Ag, dots of ∼50 nm average size and ∼4 nm average height can be grown with spatial and size distributions dictated by the template. The dots are in a metastable state. Further Ag deposition drives the dot surface structure to nanoripple formation. Results show that electrodeposition on nanopatterned electrodes can be used to prepare a high density of nanostructures with a narrow size distribution and spatial order.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas